2017 South Korean presidential election
Results

Candidate
Candidate
Party
Votes
%
%
-
Moon Jae-in
Democratic
13,423,800
41.08
-
-
Hong Jun-pyo
Liberty Korea
7,852,849
24.03
-
-
Ahn Cheol-soo
People's
6,998,342
21.41
-
-
Yoo Seong-min
Bareun
2,208,771
6.76
-
-
Sim Sang-jung
Justice
2,017,458
6.17
-
-
Cho Won-jin
Saenuri
42,949
0.13
-
-
Kim Min-chan
Independent
33,990
0.10
-
-
Kim Sun-dong
People's United
27,229
0.08
-
-
Chang Sŏng-min
Grand National United
21,709
0.06
-
-
Yoon Hong-sik
Hongik
18,543
0.05
-
-
Lee Kyung-hee
Korean Nationalist
11,355
0.03
-
-
Lee Jae-oh
Evergreen Korea
9,140
0.02
-
-
Oh Young-guk
Economic Patriot
6,040
0.01
-
Invalid/blank votes
Invalid/blank votes
Invalid/blank votes
135,733
–
–
Total
Total
Total
32,807,908
100
100
Registered voters/turnout
Registered voters/turnout
Registered voters/turnout
42,479,710
77.23
77.23
Source: National Election Commission
Source: National Election Commission
Source: National Election Commission
Source: National Election Commission
Source: National Election Commission
Source: National Election Commission

Question: By defeating whom (the closest opponent), Moon Jae-in won the 2017 South Korean presidential election?
Answer: Moon Jae-in of the Democratic Party of Korea defeated Hong Jun-pyo by  41.08% of the votes to 24.03% of the votes, and won the 2017 South Korean presidential election.